Car-bolster.



C. A. LINDSTRM.

GAR BOLSTBR.

APPLICATION FILED JAN. 6, 1903.

N0 MODEL.

PATENTED APR. 26, 1904:.

2 SHEETS-SHEET 41.

Jo" QT V wveMoz PATENTED APR. 26, 1904.

c. A. LINDsrRM.

GAR BoLsTBR. APPLIOATION TILBD JAN. 6,'1903.

2 SHEETS-SHEET 2.

l0 MODEL.

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UNITED STATES Patented April 2e, 1904.

PATENT OFFICE.

CHARLES A. LINDSTROM, OF ALLEGHENY, PENNSYLVANIA, ASSIGNOR TO PRESSED STEEL CAR COMPANY, OF PITTSBURG, PENNSYLVANIA, A

CORPORATION OF NEW JERSEY.

CAR-BOLSTER.

SPECIFICATION forming part of Letters Patent No. 758, 542, dated. April 26, 1904,

Application filed January 6, 1903.

To all whom, t may concern:

Be it known that I, CHARLES A. LINDsTRM, a citizen of the United States, residing at Alleghen y, in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in Car-Bol sters, (Case 13,) of which the following isa full, clear, and exact description.

A main object of this invention is to utilize commercial shapes as far as possible in the manufacture of metallic body bolsters for cars, and whether the bolster has parallel top and bottom edges or be belliedwthat is tosay, deeper in the center than at the ends.

In the construction of the bolster the sides and the top and bottom flanges are made of integral or composite Z'bars and top and bottom connecting-plates are used, all being riv eted together.

In the accompanying drawings, illustrating the invention, in the several figures of which like parts are similarly designated, Figure 1 is a top plan view of one form. Fig. 2 is a top plan View of another form. Fig. 3 is a central vertical cross-section of Fig. 1. Fig. 4 is a central vertical cross-section of Fig. 2. Fig. 5 is a view similar to Fig. 1, but with the top plate arranged above the anges. Fig. 6 is a side elevation, and Fig. 7 is a longitudinal section, of the bellied bolster of Figs. 2 and 4.

Referring to Figs. 1 and 3, the sides and the top and bottom fianges are made of two rolled Z-bars 1 and 1, having' the top flanges in conjunction and the bottom flanges turned away from each other. The top flanges are united by a plate 2, extending lengthwise of the bolster and preferably from near one end to the other and riveted to the lower sides of the anges. The bottom ianges are united by a plate 3, riveted thereto and extending lengthwise of the bolster coterminously or for any desired distance between its ends, and preferably of greatest width in the plane of the center sills.

As shown in Figs. 2 and 4, the Z-bar bolster may be of composite structure and have Serial No. 138,025. (No model.)

its sides 4 of plates, the top fianges being angles 5 and the bottom flanges angles 6, riveted to the side plates. In this case the top plate 7 is preferably placed above the top iianges and riveted to them, and the said plate has its upper surface on a level or flush with the tops of the side plates. The bottom plate is as before described. In this composite construction the sides of the bolster may be made deeper at the center than at the ends, as shown in Figs. 6 and 7.

As shown in Fig. 5, the topplate Q may be arranged above the top flanges of the Z- bars.

The bolster may be united to the center sills 8 and side sills 9 by angle-brackets 10 and 11, respectively, or otherwise, and brackets 12 may be used within the ends of the bolsters for closing such ends and to afford additional means for uniting the bolsters and side sills. the side sills to connect them and the bolsters.

v Similar brackets 14 and 15 may be used to secure the draft-rigging sills 16.

The bolsters are stiffened and separated at the points where the center and draft-rigging sills are joined to them by vertically-arranged 'sections 17 of channel-bars, Fig. 1, or by similar-pressed shapes 18, Fig. 2. These stifeners are not shown in Figs 3, 4, and 5 in order to avoid confusion.

There may be filler-plates (not shown) inserted between the brackets 13 and sides of the bolster in the form shown in Fig. 4.

While it might be possible to reverse the arrangement of the Z-bars and have their bottom flanges turned in, still the construction illustrated is preferred.

While it is preferred to use commercial shapes in the construction of the bolster herein shown and described, itis to be understood that some or all of the parts may be of pressed steel.

The bolster of this invention is designed especially for use in connection with gondola and flat cars built of structural material. In such cars the question of proper strength not Brackets 13 may be used between only in a vertical but also in a horizontal direction must be carefully considered. In the ordinary construction of bolsters tie-plates are generally used to stiffen the bolsters in a horizontal direction; but when metal oors are used there is no room for tie-plates, and the strength therefore must be provided for in the bolster itself. The bolster of this invention meets these requirements.

WYhat I claim is- 1. A bolster having parallel sides, and top and bottom fiauges, of Z-bar cross-section, with the top fianges extending inwardly, a top cover-plate secured to the top fianges and having its upper surface flush with the upper edges of the sides, and a bottom cover-plate.

2. A bolster, having sides, and top and bottoni fianges, constructed of two straight and parallel Z-bar sections, a top cover-plate, a bottom cover-plate, and vertically-arranged stiffeners or separators between the sides.

3. A bolster, having sides, and top and bottom flanges, constructed of two straight and parallel Z-bar sections, a top cover-plate sunk between the sides to the level of the upper edges of the sides; a bottom cover-plate, and

vertically-arranged stieners or separators between the sides.

4. A bolster, having sides, and top and bottom fianges, constructed of two straight and parallel Z-bars, and vertically-arranged stiffeners or separators between said sides.

5. A bolster, having its body formed of parallel sides with inwardly-projecting anges at the top and outwardly-projecting flanges at the bottom, said sides being free from other anges, and a central longitudinal strengthen-- ing cover-plate secured to said top anges.

6. A bolster, having its body formed of parallel sides with inwardly-projecting fianges at the top and outwardly-projecting lianges at the bottom, said sides being free from other flanges, and a central longitudinal strengthening cover-plate secured to said top flanges between the sides and having its top surface flush or level with the top edges of' the sides.

In testimony whereof I have hereunto set my hand this 3d day of January, A. 1). l903.

CHARLES A. LINDSTROM.

Witnesses:

J. C. LANGFITT, W. L. CARR. 

